Basically, have two SCPs that are both different interpretations of a myth.
Since there is no canon they could be from different histories or universes.
Like have one an anomalous object and the other an anamalous creature, or something.
And of course, have different effects. Myths can have widely different interpretations or elements to them, so there could be more than enough material to use for two SCPs, at least with some myths.

The idea certainly has potential, but you're going to have to be more specific than just saying "myths." It might actually be more interesting to connect them in-universe; otherwise you would just have two "myth, but in SCP form!" articles, which don't really go over that well.